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Alik [6]
3 years ago
6

WILL GIVE BRAINLEST please explain with work if possible

Mathematics
1 answer:
Nikolay [14]3 years ago
3 0

Answer:

a)60°

b)BD=10

c)AB=20

d)100√3

Step-by-step explanation:

B

let's BD be x

according to the question

\tan( {30}^{o} )  =  \frac{x}{10 \sqrt{3} }

\frac{ \sqrt{3} }{3}  =  \frac{x}{10 \sqrt{3} }

3x = 10 \sqrt{3}  \times  \sqrt{3}

3x = 30

x = 10

<h2>therefore</h2><h3>BD=10</h3>

c)

according to Pythagoras theorem

a²+b²=c²

c=√a²+b²

c=√10²+(10√3)²

c=√100+300

c=√400

c=20

D)

<u>the</u><u> </u><u>two</u><u> triangles</u><u> are</u><u> congruent</u>

so AC=2(10√3)

=20√3

as we know

area of a triangle =

½bh

=½×20√3×10

=10√3×10

=100√3

<h2>this will guide you</h2>

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WILL GIVE BRAINLIEST!!!! if you show your work...
Ierofanga [76]

Answer:

(x² + 7x + 6) ÷ (x² + 2x + 1)

This should be in the form of a fraction, I just don't know how to format it that way on here.

Step-by-step explanation:

Since your denominators are equal on both fractions, you just need to subtract your numerators.

3x² + 9x + 12 - (2x² + 2x + 6)

When there is a - in front of an expression in parenthesis, you should change the sign of each term in the expression of the numerator being subtracted.

So this:

2x² + 2x + 6

Will become this:

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This is how it will look:

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Now all you have to do is collect the like terms.

3x² and -2x² are like terms so you will add them together: 3x² + (-2x²) = 3x² - 2x² = x²

This is how your numerator should look so far:

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Now we move on to the next like terms.

9x and -2x are like terms so we add them together: 9x + (-2x) = 9x - 2x = 7x

This is how your numerator should look so far:

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Now we move on to the last set of like terms.

12 and -6 are like terms so we add them together: 12 + (-6) = 12 - 6 = 6

This is how your numerator should be now:

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Now all you have to do is put your numerator on top of your denominator which is the same as in the start of your equation (x² + 2x + 1).

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5 0
3 years ago
Determine the qualities of the given set. (select all that apply. ){(x, y) | x &gt; 0, y &gt; 0}
Talja [164]

The qualities of the set {(x,y): x>0,y>0} is as under:

  • All points lie in first quadrant.
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Given a set {(x,y),x>0,y>0}.

We are required to determine the qualities of the set.

We know that a set is a collection of things,numbers, fractions, etc.

In any set the values of x represents the domain of the function and the values of y represents the value of codomain of the function with which the set belongs to.

Set={(x,y): x>0,y>0}

From the above set we can find the qualities stated below:

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Hence the qualities of the set {(x,y): x>0,y>0} are that all values should be in first quadrant and all the values are positive.

Learn more about sets at brainly.com/question/2166579

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6 0
2 years ago
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Step-by-step explanation:

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